Why? There is absolutely no correlation (much less causation) between CO2 in the atmosphere and "Climate Change" for as far back as we can get reliable readings. It is not a serious issue for competent scientists without a left wing agenda.
Don't you read the threads on the "Man Caused Global Warming" hoax on the threads here?
A technician replaces parts to fix the car.
A mechanic fixes the problem the re-installs the part to fix the car. Dealerships employ technicians.